A modification method of highly dispersed rubber filler carbon nanotubes

A technology of carbon nanotubes and rubber fillers is applied in the field of high dispersity preparation of solution-polymerized styrene-butadiene rubber filler carbon nanotubes. , the effect of improving compatibility

Active Publication Date: 2021-03-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method not only solves the problem that carbon nanotubes are prone to agglomeration during long-term storage and high-temperature, high-shear processing.

Method used

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  • A modification method of highly dispersed rubber filler carbon nanotubes
  • A modification method of highly dispersed rubber filler carbon nanotubes
  • A modification method of highly dispersed rubber filler carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of amination of carbon nanotubes: 100 parts of carbon nanotubes, 150 parts of concentrated nitric acid, 50 parts of concentrated sulfuric acid, and 10 parts of potassium permanganate are mixed in a reactor, treated with 50 kHz ultrasonic waves for 1 hr, and then Heat to 50°C, stir and cook with acid for 2 hours, cool, filter, and wash until the filtrate is neutral, then add 200 parts of hexamethylenetetramine, then heat to 70°C, stir for 2 hours, filter with suction, wash, and dry. The carbon nanotube a with amine groups on the surface is obtained.

[0034] (2) Preparation of grafted solution-polymerized styrene-butadiene mortar: first add 300 parts of cyclohexane in the polymerization kettle, then add 100 parts of solution-polymerized styrene-butadiene mortar SSBR2564s, 0.05 part of tert-dodecyl mercaptan in sequence, and use nitrogen gas to After the replacement, add 1 part of methacrylamide, stir and heat, add 0.05 part of DCP when the temperature of ...

Embodiment 2

[0037] (1) Preparation of carbon nanotube amination: same as Example 1.

[0038] (2) Preparation of grafted solution-polymerized styrene-butadiene mortar: with embodiment 1.

[0039] (3) Preparation of highly dispersed carbon nanotubes: 100 parts of aminated carbon nanotubes a and 350 parts of cyclohexane were added to the polymerization kettle and stirred for 15 minutes; , stirred and heated to 60° C., stirred and reacted for 3 hours, and then flashed, dried, and ground to obtain highly dispersed carbon nanotubes. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 3

[0041] (1) Preparation of carbon nanotube amination: put 100 parts of carbon nanotubes, 180 parts of concentrated nitric acid, 70 parts of concentrated sulfuric acid, and 30 parts of potassium permanganate into a reactor and mix them with 80 kHz ultrasonic treatment for 1.5 hr. Then heat to 70°C, stir and cook with acid for 5hr, cool, filter with suction, wash until the filtrate is neutral, add 300 parts of hexamethylenetetramine, heat to 80°C, stir for 3hr, filter with suction, wash and dry , to obtain carbon nanotubes b with amine groups on the surface.

[0042] (2) Preparation of grafted solution-polymerized styrene-butadiene mortar: first add 450 parts of cyclohexane in the polymerization kettle, then add 100 parts of solution-polymerized styrene-butadiene mortar SSBR2564s, 0.3 part of tert-dodecyl mercaptan in sequence, and use nitrogen gas to After the replacement, add 7 parts of methacrylamide, stir and heat, add 0.1 part of DCP when the temperature of the polymerizatio...

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Abstract

A purpose of the present invention is to provide a rubber filler highly-dispersed carbon nano-tube modification method. According to the present invention, the surface of carbon nano-tubes is subjected to amination treatment with a strong-oxidation acid and a polyamine, solution polymerized styrene-butadiene latex is subjected to grafting polymerization with an unsaturated vinyl amide polar monomer, and finally the highly-dispersed carbon nano-tubes are prepared through coating treatment; and with the method, the problems that the carbon nano-tubes are easily agglomerated during long-term storage and high-temperature and high-shear processing can be solved, the compatibility of the carbon nano-tubes and the solution polymerized styrene-butadiene rubber can be significantly improved, and the high dispersibility of the carbon nano-tubes in the solution polymerized styrene-butadiene rubber matrix can be achieved.

Description

technical field [0001] The invention relates to a method for preparing solution-polymerized styrene-butadiene rubber filler carbon nanotubes with high dispersibility. Background technique [0002] Carbon Nanotube (CNT for short) is a new type of carbon structure discovered in 1991. It is a tube formed by graphite sheets formed by carbon atoms. Since carbon atoms in carbon nanotubes adopt all SP 2 hybrid link, compared to SP 3 Hybrid SP 2 There are many S orbital components in the hybridization, and the carbon-carbon bond energy is large, so the carbon nanotubes have high modulus and high strength, and their tensile strength reaches 50-200GPa, which is 100 times that of steel, but the density is only 1 / of steel 6. Its elastic modulus can reach 100TPa, which is equivalent to that of diamond. Therefore, the excellent mechanical properties of carbon nanotubes will be more conducive to endowing polymer materials with high strength, low expansion, high wear resistance and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08K9/02C08K9/04C08K9/10C08K7/24C08K3/04C08F279/02C08F220/54
CPCC08F279/02C08K3/04C08K7/24C08K9/02C08K9/04C08K9/10C08K2201/011C08L9/06C08F220/54
Inventor 徐典宏李福崇孟令坤朱晶赵洪国胡海华李波
Owner PETROCHINA CO LTD
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